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Statements of Cash Flows - Summary of Cash Generated From Operations (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure Of Cash Flow Statement [Abstract] |  |  |
Profit for the year | ₩ 84,902 | ₩ 131,982 | ₩ 83,058
Depreciation expense | 6,023 | 5,252 | 5,145
Amortization expense | 3,211 | 2,406 | 1,917
Bad debt expenses | 589 | 1,402 | 701
Unrealized foreign currency loss | 2,026 | 1,595 | 1,311
Interest expense | 135 | 162 | 127
Loss on disposal of property and equipment | 6 | 0 | 0
Impairment loss on intangible assets | 615 | 1,531 | 293
Impairment loss on other non-current assets | 962 | 0 | 177
Post-employment benefit expense | 127 | 23 | 66
Income tax expense | 21,445 | 36,717 | 26,824
Unrealized foreign currency gain | (3,579) | (1,417) | (689)
Interest income | (17,059) | (11,492) | (4,501)
Gain on disposal of property and equipment | (8) | (20) | (15)
Others | 0 | 6 | 6
Change in accounts receivable | (1,886) | 2,365 | (38,199)
Change in other receivables | 2,748 | (3,770) | 899
Change in prepaid expenses | (4,493) | 397 | (104)
Change in prepayment | 0 | (1) | (1,641)
Change in other current assets | (124) | (696) | 34
Change in other non-current assets | (2,318) | (3,486) | 218
Change in accounts payable | (2,879) | (13,837) | 43,900
Change in deferred revenue | 5,984 | (1,292) | 4,915
Change in withholdings | (1,546) | (262) | (631)
Change in accrued expenses | 226 | 255 | 547
Change in other current liabilities | 0 | 165 | 301
Change in other non-current liabilities | 467 | 2,247 | 15
Total | ₩ 95,574 | ₩ 150,232 | ₩ 124,674

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